If you are doing FMQ (free motion quilting) without a foot, just the darning type foot, you need your machine to go fast and your hands to move the fabric slow. If you are trying to do a FMQ type design in the borders using your walking foot I know I can't help. The walking foot always restricted my site of where I wanted to stitch so rarely used it. Then I bought a Pfaff that has the walking foot built in (it is IDT) and that is placed behind the foot and doesn't hinder site of where the needle is going.

I just ordered a Brother SQ9000, it has speed control, needle up/down and can drop feed, some simple alphabet embroidery, and many decorative stitches. You can also sew without the foot control with the start/stop button, which from my understanding, is helpful in FMQ. I haven't gotten it yet (waiting on the mail man!!! hurry up!), but as soon as I do, I'm getting a darning foot to start working on fmq.